ASTM E2446-05 - 1.6.2005
 
1. Scope

1.1 This practice describes the evaluation and classification of a computed radiography (CR) system, a particular phosphor imaging plate (IP), system scanner and software, in combination with specified metal screens for industrial radiography. It is intended to ensure that the evaluation of image quality, as far as this is influenced by the scanner/IP system, meets the needs of users.

1.2 The practice defines system tests to be used to classify the systems of different suppliers and make them comparable for users.

1.3 The CR system performance is described by signal and noise parameters. For film systems, the signal is represented by gradient and the noise by granularity. The signal-to-noise ratio is normalized by the basic spatial resolution of the system and is part of classification. The normalization is given by the scanning aperture of 100 m diameter for the micro-photometer, which is defined in Test Method E 1815 for film system classification. This practice describes how the parameters shall be measured for CR systems.

1.4 The values stated in SI are to be regarded as the standard.

1.5 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and to determine the applicability of regulatory limitations prior to use.

 
2. Referenced Documents

E2597-07

Standard Practice for Manufacturing Characterization of Digital Detector Arrays

E1165-20

Standard Test Method for Measurement of Focal Spots of Industrial X-Ray Tubes by Pinhole Imaging

E746-23

Standard Practice for Determining Relative Image Quality Response of Industrial Radiographic Imaging Systems below 4 MeV

E2445-05

Standard Practice for Qualification and Long-Term Stability of Computed Radiology Systems

E2903-18

Standard Test Method for Measurement of the Effective Focal Spot Size of Mini and Micro Focus X-ray Tubes

E2002-22

Standard Practice for Determining Image Unsharpness and Basic Spatial Resolution in Radiography and Radioscopy

E2007-10(2023)

Standard Guide for Computed Radiography

E2033-17

Standard Practice for Radiographic Examination Using Computed Radiography (Photostimulable Luminescence Method)

E1316-24

Standard Terminology for Nondestructive Examinations

E1815-18(2023)

Standard Test Method for Classification of Film Systems for Industrial Radiography